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concerned

This is a discussion on concerned within the General Help forums, part of the LSx Technical Help Section category; just bought a 2002 z28 and when i start it cold it has a slight knocking noise coming from the ...

  1. #1
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    concerned

    just bought a 2002 z28 and when i start it cold it has a slight knocking noise coming from the passanger side, it starts off kind of loud then quiets down after it warms up but doesn't actually go away, can anyone diagnose my problem? the car only has 66,000 miles on it

  2. #2
    TJEA Retirement Home Dr.Crash's Avatar
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    these motors are loud bitches. your probably fine. post a vid on youtube and link the page. im sure its normal
    Last edited by Dr.Crash; 05-05-2009 at 07:36 PM.

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    lifters probably pumping up

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    Exalted Cyclops 67CamaroRSSS's Avatar
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    2002 Z28 A4 NBM
    Sadly now demodded :(

    Piston slap?

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    Senior Member Z28Thunder's Avatar
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    Both of the aboev are common on the LS1... Lifter noise or the slapping piston. There was a service bulletin on the slap. But even when they were under warranty it was a PITA to get GM to honor that service bulletin.

  6. #6
    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by Z28Thunder View Post
    Both of the aboev are common on the LS1... Lifter noise or the slapping piston. There was a service bulletin on the slap. But even when they were under warranty it was a PITA to get GM to honor that service bulletin.
    hey is that the sunoco hood? that thing looks sick..

  7. #7
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    mine does the same thing i wouldn't worry about

  8. #8
    Senior Member Z28Thunder's Avatar
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    Arctic White
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    Quote Originally Posted by Dr.Crash View Post
    hey is that the sunoco hood? that thing looks sick..
    Yes VFN sunoco...

  9. #9
    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by Z28Thunder View Post
    Yes VFN sunoco...
    that things awsome i think i was just drooling

  10. #10
    Just me Y2KPewterSS's Avatar
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    Quote Originally Posted by Dr.Crash View Post
    that things awsome i think i was just drooling
    He is my neighbor and best friend, it is drool worthy
    CCW SP 500s 18x10 275/35 18x11 295/35
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    Quote Originally Posted by konigandy6 View Post
    I'd rather be bi than full homo!!!!

  11. #11
    Senior Member Z28Thunder's Avatar
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    Arctic White
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    Quote Originally Posted by Dr.Crash View Post
    that things awsome i think i was just drooling
    Dont want to whore his thread but

    00Z28 photos...

    CCW time!!!

    And now back on topic.

  12. #12
    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by Y2KPewterSS View Post
    He is my neighbor and best friend, it is drool worthy
    if i ever grow a pair and buy that APS TT system that is the hood i want. for sure

  13. #13
    Senior Member Z28Thunder's Avatar
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    Quote Originally Posted by Dr.Crash View Post
    if i ever grow a pair and buy that APS TT system that is the hood i want. for sure
    I like N/A myself... I dont need any of that FI stuff to run the same times..

  14. #14
    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by Z28Thunder View Post
    I like N/A myself... I dont need any of that FI stuff to run the same times..
    i like all motor too, but is that enough? i havent really even gotten into mine and i already want more power

  15. #15
    Junior Member JustOut4u's Avatar
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    thats just piston slap. 90%, if not all ls1 make that slapping noise on cold start ups. Quits after a min or 2. Nothing to worry about.

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